Oh honey, you are in the wishing stage of chickens. Wishing they will all be nice and get along. Roosters most of the time are just not like that. They can get very ornery to each other, to the pullet and even towards you and your family.
You are in the darling stage of roosters, where it is nearly impossible to imagine them being such jerks. But with 5 roosters, I am pretty sure that it is coming. And you need a plan for if it does.
You need at least a dog crate, sometimes you can find them on Craigslist, or second hand. But you need one ASAP. Get prepared before you get into trouble. You need to have a way to separate roosters if they start fighting. Fighting roosters can tear each other apart. People tend to underestimate the violence of fighting roosters. And as they are all getting along now, it is hard to imagine, but be prepared.
Personally I would not keep 5 roosters unless I had the space for a flock of 50 birds. Not because I am a believer in 1:10 ratio, but because I am a believer in space. Roosters need more space than hens. Adding more hens won't help, but will make the problem worse. They will have hens to fight over. Roosters have no concept of sharing.
Being raised together, or current behavior is no indicator how roosters will act in a week, or a month. Have a plan B.
Instead of keeping these birds, as forever friends... try and think of it as keeping a flock. Birds come and go in a flock. In the long run, I am very confident that you will have a much happier flock that will be a joy to be around, if you let the roosters go. You really have a flock set up to be a disaster.
I know this is not what you want to hear. I do love having one rooster at a time. But I am very comfortable with removing any bird that does not work in my flock. I keep a flock.
Mrs K